It's great that you're paying close attention to your test results — that kind of awareness really matters when managing PBC.
Being AMA-negative with PBC is less common, affecting about 5% of people with PBC. In those cases, doctors often look for other antibodies, like antinuclear antibodies (ANA), to help confirm the Show Full Answer
It's great that you're paying close attention to your test results — that kind of awareness really matters when managing PBC.
Being AMA-negative with PBC is less common, affecting about 5% of people with PBC. In those cases, doctors often look for other antibodies, like antinuclear antibodies (ANA), to help confirm the diagnosis.
Anti-sp100 is a specific type of ANA that shows up as "multiple nuclear dots" on testing — exactly what you're describing. While it's less common than AMA, it is a recognized marker associated with PBC, particularly in AMA-negative cases. A few important things to know:
- AMA-negative PBC is typically managed the same way as AMA-positive PBC
- Treatment response is generally just as good regardless of AMA status
- A liver biopsy may be recommended to help confirm the diagnosis when AMA is absent
Your 1:640 titer is notably high, so it's worth discussing what this means for your specific situation with your specialist. They can best interpret how this fits alongside your other results, like your ALP levels.
Other myPBCteam members have shared similar experiences navigating less common antibody results — you're definitely not alone in this.
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